Abstract

Arranging anisotropic nanoparticles into ordered assemblies remains a challenging quest requiring innovative andingenuous approaches. The variety of interactions present in colloidal solutions of nonspherical inorganic nanocrystals can be exploited for this purpose. By tuning depletion attraction forces between hydrophobic colloidal nanorods of semiconductors, dispersed in an organic solvent, these could be assembled into 2D monolayers of close-packed hexagonally ordered arrays directly in solution. Once formed, these layers could be fished onto a substrate, and sheets of vertically standing rods were fabricated, with no additional external bias applied. Alternatively, the assemblies could be isolated and redispersed in polar solvents, yielding suspensions of micrometer- sized sheets which could be chemically treated directly in solution. Depletion attraction forces were also effective in the shape-selective separation of nanorods from binary mixtures of rods and spheres. The reported procedures have the potential to enable powerfuland cost-effective fabrication approaches to materials and devices based on self-organized anisotropic nanoparticles.

Autore Pugliese

• Giannini Cinzia

Tutti gli autori

• Baranov D.; Fiore A.; van Huis M.; Giannini C.; Falqui A.; Lafont U.; Zandbergen H.; Zanella M.; Cingolani R.; Manna L.

Titolo volume/Rivista

Nano letters

Anno di pubblicazione

2010

ISSN

1530-6984

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

Non Disponibile

Ultimo Aggiornamento Citazioni

Non Disponibile

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile